1 // SPDX-License-Identifier: GPL-2.0-only
2 /****************************************************************************
3 * Driver for Solarflare network controllers and boards
4 * Copyright 2018 Solarflare Communications Inc.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published
8 * by the Free Software Foundation, incorporated herein by reference.
9 */
10
11 #include "mcdi_port_common.h"
12 #include "efx_common.h"
13 #include "nic.h"
14
efx_mcdi_get_phy_cfg(struct efx_nic * efx,struct efx_mcdi_phy_data * cfg)15 int efx_mcdi_get_phy_cfg(struct efx_nic *efx, struct efx_mcdi_phy_data *cfg)
16 {
17 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PHY_CFG_OUT_LEN);
18 size_t outlen;
19 int rc;
20
21 BUILD_BUG_ON(MC_CMD_GET_PHY_CFG_IN_LEN != 0);
22 BUILD_BUG_ON(MC_CMD_GET_PHY_CFG_OUT_NAME_LEN != sizeof(cfg->name));
23
24 rc = efx_mcdi_rpc(efx, MC_CMD_GET_PHY_CFG, NULL, 0,
25 outbuf, sizeof(outbuf), &outlen);
26 if (rc)
27 goto fail;
28
29 if (outlen < MC_CMD_GET_PHY_CFG_OUT_LEN) {
30 rc = -EIO;
31 goto fail;
32 }
33
34 cfg->flags = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_FLAGS);
35 cfg->type = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_TYPE);
36 cfg->supported_cap =
37 MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_SUPPORTED_CAP);
38 cfg->channel = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_CHANNEL);
39 cfg->port = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_PRT);
40 cfg->stats_mask = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_STATS_MASK);
41 memcpy(cfg->name, MCDI_PTR(outbuf, GET_PHY_CFG_OUT_NAME),
42 sizeof(cfg->name));
43 cfg->media = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_MEDIA_TYPE);
44 cfg->mmd_mask = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_MMD_MASK);
45 memcpy(cfg->revision, MCDI_PTR(outbuf, GET_PHY_CFG_OUT_REVISION),
46 sizeof(cfg->revision));
47
48 return 0;
49
50 fail:
51 netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
52 return rc;
53 }
54
efx_link_set_advertising(struct efx_nic * efx,const unsigned long * advertising)55 void efx_link_set_advertising(struct efx_nic *efx,
56 const unsigned long *advertising)
57 {
58 memcpy(efx->link_advertising, advertising,
59 sizeof(__ETHTOOL_DECLARE_LINK_MODE_MASK()));
60
61 efx->link_advertising[0] |= ADVERTISED_Autoneg;
62 if (advertising[0] & ADVERTISED_Pause)
63 efx->wanted_fc |= (EFX_FC_TX | EFX_FC_RX);
64 else
65 efx->wanted_fc &= ~(EFX_FC_TX | EFX_FC_RX);
66 if (advertising[0] & ADVERTISED_Asym_Pause)
67 efx->wanted_fc ^= EFX_FC_TX;
68 }
69
efx_mcdi_set_link(struct efx_nic * efx,u32 capabilities,u32 flags,u32 loopback_mode,u32 loopback_speed)70 int efx_mcdi_set_link(struct efx_nic *efx, u32 capabilities,
71 u32 flags, u32 loopback_mode, u32 loopback_speed)
72 {
73 MCDI_DECLARE_BUF(inbuf, MC_CMD_SET_LINK_IN_LEN);
74
75 BUILD_BUG_ON(MC_CMD_SET_LINK_OUT_LEN != 0);
76
77 MCDI_SET_DWORD(inbuf, SET_LINK_IN_CAP, capabilities);
78 MCDI_SET_DWORD(inbuf, SET_LINK_IN_FLAGS, flags);
79 MCDI_SET_DWORD(inbuf, SET_LINK_IN_LOOPBACK_MODE, loopback_mode);
80 MCDI_SET_DWORD(inbuf, SET_LINK_IN_LOOPBACK_SPEED, loopback_speed);
81
82 return efx_mcdi_rpc(efx, MC_CMD_SET_LINK, inbuf, sizeof(inbuf),
83 NULL, 0, NULL);
84 }
85
efx_mcdi_loopback_modes(struct efx_nic * efx,u64 * loopback_modes)86 int efx_mcdi_loopback_modes(struct efx_nic *efx, u64 *loopback_modes)
87 {
88 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LOOPBACK_MODES_OUT_LEN);
89 size_t outlen;
90 int rc;
91
92 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LOOPBACK_MODES, NULL, 0,
93 outbuf, sizeof(outbuf), &outlen);
94 if (rc)
95 goto fail;
96
97 if (outlen < (MC_CMD_GET_LOOPBACK_MODES_OUT_SUGGESTED_OFST +
98 MC_CMD_GET_LOOPBACK_MODES_OUT_SUGGESTED_LEN)) {
99 rc = -EIO;
100 goto fail;
101 }
102
103 *loopback_modes = MCDI_QWORD(outbuf, GET_LOOPBACK_MODES_OUT_SUGGESTED);
104
105 return 0;
106
107 fail:
108 netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
109 return rc;
110 }
111
mcdi_to_ethtool_linkset(u32 media,u32 cap,unsigned long * linkset)112 void mcdi_to_ethtool_linkset(u32 media, u32 cap, unsigned long *linkset)
113 {
114 #define SET_BIT(name) __set_bit(ETHTOOL_LINK_MODE_ ## name ## _BIT, \
115 linkset)
116
117 bitmap_zero(linkset, __ETHTOOL_LINK_MODE_MASK_NBITS);
118 switch (media) {
119 case MC_CMD_MEDIA_KX4:
120 SET_BIT(Backplane);
121 if (cap & (1 << MC_CMD_PHY_CAP_1000FDX_LBN))
122 SET_BIT(1000baseKX_Full);
123 if (cap & (1 << MC_CMD_PHY_CAP_10000FDX_LBN))
124 SET_BIT(10000baseKX4_Full);
125 if (cap & (1 << MC_CMD_PHY_CAP_40000FDX_LBN))
126 SET_BIT(40000baseKR4_Full);
127 break;
128
129 case MC_CMD_MEDIA_XFP:
130 case MC_CMD_MEDIA_SFP_PLUS:
131 case MC_CMD_MEDIA_QSFP_PLUS:
132 SET_BIT(FIBRE);
133 if (cap & (1 << MC_CMD_PHY_CAP_1000FDX_LBN)) {
134 SET_BIT(1000baseT_Full);
135 SET_BIT(1000baseX_Full);
136 }
137 if (cap & (1 << MC_CMD_PHY_CAP_10000FDX_LBN)) {
138 SET_BIT(10000baseCR_Full);
139 SET_BIT(10000baseLR_Full);
140 SET_BIT(10000baseSR_Full);
141 }
142 if (cap & (1 << MC_CMD_PHY_CAP_40000FDX_LBN)) {
143 SET_BIT(40000baseCR4_Full);
144 SET_BIT(40000baseSR4_Full);
145 }
146 if (cap & (1 << MC_CMD_PHY_CAP_100000FDX_LBN)) {
147 SET_BIT(100000baseCR4_Full);
148 SET_BIT(100000baseSR4_Full);
149 }
150 if (cap & (1 << MC_CMD_PHY_CAP_25000FDX_LBN)) {
151 SET_BIT(25000baseCR_Full);
152 SET_BIT(25000baseSR_Full);
153 }
154 if (cap & (1 << MC_CMD_PHY_CAP_50000FDX_LBN))
155 SET_BIT(50000baseCR2_Full);
156 break;
157
158 case MC_CMD_MEDIA_BASE_T:
159 SET_BIT(TP);
160 if (cap & (1 << MC_CMD_PHY_CAP_10HDX_LBN))
161 SET_BIT(10baseT_Half);
162 if (cap & (1 << MC_CMD_PHY_CAP_10FDX_LBN))
163 SET_BIT(10baseT_Full);
164 if (cap & (1 << MC_CMD_PHY_CAP_100HDX_LBN))
165 SET_BIT(100baseT_Half);
166 if (cap & (1 << MC_CMD_PHY_CAP_100FDX_LBN))
167 SET_BIT(100baseT_Full);
168 if (cap & (1 << MC_CMD_PHY_CAP_1000HDX_LBN))
169 SET_BIT(1000baseT_Half);
170 if (cap & (1 << MC_CMD_PHY_CAP_1000FDX_LBN))
171 SET_BIT(1000baseT_Full);
172 if (cap & (1 << MC_CMD_PHY_CAP_10000FDX_LBN))
173 SET_BIT(10000baseT_Full);
174 break;
175 }
176
177 if (cap & (1 << MC_CMD_PHY_CAP_PAUSE_LBN))
178 SET_BIT(Pause);
179 if (cap & (1 << MC_CMD_PHY_CAP_ASYM_LBN))
180 SET_BIT(Asym_Pause);
181 if (cap & (1 << MC_CMD_PHY_CAP_AN_LBN))
182 SET_BIT(Autoneg);
183
184 #undef SET_BIT
185 }
186
ethtool_linkset_to_mcdi_cap(const unsigned long * linkset)187 u32 ethtool_linkset_to_mcdi_cap(const unsigned long *linkset)
188 {
189 u32 result = 0;
190
191 #define TEST_BIT(name) test_bit(ETHTOOL_LINK_MODE_ ## name ## _BIT, \
192 linkset)
193
194 if (TEST_BIT(10baseT_Half))
195 result |= (1 << MC_CMD_PHY_CAP_10HDX_LBN);
196 if (TEST_BIT(10baseT_Full))
197 result |= (1 << MC_CMD_PHY_CAP_10FDX_LBN);
198 if (TEST_BIT(100baseT_Half))
199 result |= (1 << MC_CMD_PHY_CAP_100HDX_LBN);
200 if (TEST_BIT(100baseT_Full))
201 result |= (1 << MC_CMD_PHY_CAP_100FDX_LBN);
202 if (TEST_BIT(1000baseT_Half))
203 result |= (1 << MC_CMD_PHY_CAP_1000HDX_LBN);
204 if (TEST_BIT(1000baseT_Full) || TEST_BIT(1000baseKX_Full) ||
205 TEST_BIT(1000baseX_Full))
206 result |= (1 << MC_CMD_PHY_CAP_1000FDX_LBN);
207 if (TEST_BIT(10000baseT_Full) || TEST_BIT(10000baseKX4_Full) ||
208 TEST_BIT(10000baseCR_Full) || TEST_BIT(10000baseLR_Full) ||
209 TEST_BIT(10000baseSR_Full))
210 result |= (1 << MC_CMD_PHY_CAP_10000FDX_LBN);
211 if (TEST_BIT(40000baseCR4_Full) || TEST_BIT(40000baseKR4_Full) ||
212 TEST_BIT(40000baseSR4_Full))
213 result |= (1 << MC_CMD_PHY_CAP_40000FDX_LBN);
214 if (TEST_BIT(100000baseCR4_Full) || TEST_BIT(100000baseSR4_Full))
215 result |= (1 << MC_CMD_PHY_CAP_100000FDX_LBN);
216 if (TEST_BIT(25000baseCR_Full) || TEST_BIT(25000baseSR_Full))
217 result |= (1 << MC_CMD_PHY_CAP_25000FDX_LBN);
218 if (TEST_BIT(50000baseCR2_Full))
219 result |= (1 << MC_CMD_PHY_CAP_50000FDX_LBN);
220 if (TEST_BIT(Pause))
221 result |= (1 << MC_CMD_PHY_CAP_PAUSE_LBN);
222 if (TEST_BIT(Asym_Pause))
223 result |= (1 << MC_CMD_PHY_CAP_ASYM_LBN);
224 if (TEST_BIT(Autoneg))
225 result |= (1 << MC_CMD_PHY_CAP_AN_LBN);
226
227 #undef TEST_BIT
228
229 return result;
230 }
231
efx_get_mcdi_phy_flags(struct efx_nic * efx)232 u32 efx_get_mcdi_phy_flags(struct efx_nic *efx)
233 {
234 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
235 enum efx_phy_mode mode, supported;
236 u32 flags;
237
238 /* TODO: Advertise the capabilities supported by this PHY */
239 supported = 0;
240 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_TXDIS_LBN))
241 supported |= PHY_MODE_TX_DISABLED;
242 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_LOWPOWER_LBN))
243 supported |= PHY_MODE_LOW_POWER;
244 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_POWEROFF_LBN))
245 supported |= PHY_MODE_OFF;
246
247 mode = efx->phy_mode & supported;
248
249 flags = 0;
250 if (mode & PHY_MODE_TX_DISABLED)
251 flags |= (1 << MC_CMD_SET_LINK_IN_TXDIS_LBN);
252 if (mode & PHY_MODE_LOW_POWER)
253 flags |= (1 << MC_CMD_SET_LINK_IN_LOWPOWER_LBN);
254 if (mode & PHY_MODE_OFF)
255 flags |= (1 << MC_CMD_SET_LINK_IN_POWEROFF_LBN);
256
257 return flags;
258 }
259
mcdi_to_ethtool_media(u32 media)260 u8 mcdi_to_ethtool_media(u32 media)
261 {
262 switch (media) {
263 case MC_CMD_MEDIA_XAUI:
264 case MC_CMD_MEDIA_CX4:
265 case MC_CMD_MEDIA_KX4:
266 return PORT_OTHER;
267
268 case MC_CMD_MEDIA_XFP:
269 case MC_CMD_MEDIA_SFP_PLUS:
270 case MC_CMD_MEDIA_QSFP_PLUS:
271 return PORT_FIBRE;
272
273 case MC_CMD_MEDIA_BASE_T:
274 return PORT_TP;
275
276 default:
277 return PORT_OTHER;
278 }
279 }
280
efx_mcdi_phy_decode_link(struct efx_nic * efx,struct efx_link_state * link_state,u32 speed,u32 flags,u32 fcntl)281 void efx_mcdi_phy_decode_link(struct efx_nic *efx,
282 struct efx_link_state *link_state,
283 u32 speed, u32 flags, u32 fcntl)
284 {
285 switch (fcntl) {
286 case MC_CMD_FCNTL_AUTO:
287 WARN_ON(1); /* This is not a link mode */
288 link_state->fc = EFX_FC_AUTO | EFX_FC_TX | EFX_FC_RX;
289 break;
290 case MC_CMD_FCNTL_BIDIR:
291 link_state->fc = EFX_FC_TX | EFX_FC_RX;
292 break;
293 case MC_CMD_FCNTL_RESPOND:
294 link_state->fc = EFX_FC_RX;
295 break;
296 default:
297 WARN_ON(1);
298 fallthrough;
299 case MC_CMD_FCNTL_OFF:
300 link_state->fc = 0;
301 break;
302 }
303
304 link_state->up = !!(flags & (1 << MC_CMD_GET_LINK_OUT_LINK_UP_LBN));
305 link_state->fd = !!(flags & (1 << MC_CMD_GET_LINK_OUT_FULL_DUPLEX_LBN));
306 link_state->speed = speed;
307 }
308
309 /* The semantics of the ethtool FEC mode bitmask are not well defined,
310 * particularly the meaning of combinations of bits. Which means we get to
311 * define our own semantics, as follows:
312 * OFF overrides any other bits, and means "disable all FEC" (with the
313 * exception of 25G KR4/CR4, where it is not possible to reject it if AN
314 * partner requests it).
315 * AUTO on its own means use cable requirements and link partner autoneg with
316 * fw-default preferences for the cable type.
317 * AUTO and either RS or BASER means use the specified FEC type if cable and
318 * link partner support it, otherwise autoneg/fw-default.
319 * RS or BASER alone means use the specified FEC type if cable and link partner
320 * support it and either requests it, otherwise no FEC.
321 * Both RS and BASER (whether AUTO or not) means use FEC if cable and link
322 * partner support it, preferring RS to BASER.
323 */
ethtool_fec_caps_to_mcdi(u32 supported_cap,u32 ethtool_cap)324 u32 ethtool_fec_caps_to_mcdi(u32 supported_cap, u32 ethtool_cap)
325 {
326 u32 ret = 0;
327
328 if (ethtool_cap & ETHTOOL_FEC_OFF)
329 return 0;
330
331 if (ethtool_cap & ETHTOOL_FEC_AUTO)
332 ret |= ((1 << MC_CMD_PHY_CAP_BASER_FEC_LBN) |
333 (1 << MC_CMD_PHY_CAP_25G_BASER_FEC_LBN) |
334 (1 << MC_CMD_PHY_CAP_RS_FEC_LBN)) & supported_cap;
335 if (ethtool_cap & ETHTOOL_FEC_RS &&
336 supported_cap & (1 << MC_CMD_PHY_CAP_RS_FEC_LBN))
337 ret |= (1 << MC_CMD_PHY_CAP_RS_FEC_LBN) |
338 (1 << MC_CMD_PHY_CAP_RS_FEC_REQUESTED_LBN);
339 if (ethtool_cap & ETHTOOL_FEC_BASER) {
340 if (supported_cap & (1 << MC_CMD_PHY_CAP_BASER_FEC_LBN))
341 ret |= (1 << MC_CMD_PHY_CAP_BASER_FEC_LBN) |
342 (1 << MC_CMD_PHY_CAP_BASER_FEC_REQUESTED_LBN);
343 if (supported_cap & (1 << MC_CMD_PHY_CAP_25G_BASER_FEC_LBN))
344 ret |= (1 << MC_CMD_PHY_CAP_25G_BASER_FEC_LBN) |
345 (1 << MC_CMD_PHY_CAP_25G_BASER_FEC_REQUESTED_LBN);
346 }
347 return ret;
348 }
349
350 /* Invert ethtool_fec_caps_to_mcdi. There are two combinations that function
351 * can never produce, (baser xor rs) and neither req; the implementation below
352 * maps both of those to AUTO. This should never matter, and it's not clear
353 * what a better mapping would be anyway.
354 */
mcdi_fec_caps_to_ethtool(u32 caps,bool is_25g)355 u32 mcdi_fec_caps_to_ethtool(u32 caps, bool is_25g)
356 {
357 bool rs = caps & (1 << MC_CMD_PHY_CAP_RS_FEC_LBN),
358 rs_req = caps & (1 << MC_CMD_PHY_CAP_RS_FEC_REQUESTED_LBN),
359 baser = is_25g ? caps & (1 << MC_CMD_PHY_CAP_25G_BASER_FEC_LBN)
360 : caps & (1 << MC_CMD_PHY_CAP_BASER_FEC_LBN),
361 baser_req = is_25g ? caps & (1 << MC_CMD_PHY_CAP_25G_BASER_FEC_REQUESTED_LBN)
362 : caps & (1 << MC_CMD_PHY_CAP_BASER_FEC_REQUESTED_LBN);
363
364 if (!baser && !rs)
365 return ETHTOOL_FEC_OFF;
366 return (rs_req ? ETHTOOL_FEC_RS : 0) |
367 (baser_req ? ETHTOOL_FEC_BASER : 0) |
368 (baser == baser_req && rs == rs_req ? 0 : ETHTOOL_FEC_AUTO);
369 }
370
371 /* Verify that the forced flow control settings (!EFX_FC_AUTO) are
372 * supported by the link partner. Warn the user if this isn't the case
373 */
efx_mcdi_phy_check_fcntl(struct efx_nic * efx,u32 lpa)374 void efx_mcdi_phy_check_fcntl(struct efx_nic *efx, u32 lpa)
375 {
376 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
377 u32 rmtadv;
378
379 /* The link partner capabilities are only relevant if the
380 * link supports flow control autonegotiation
381 */
382 if (~phy_cfg->supported_cap & (1 << MC_CMD_PHY_CAP_AN_LBN))
383 return;
384
385 /* If flow control autoneg is supported and enabled, then fine */
386 if (efx->wanted_fc & EFX_FC_AUTO)
387 return;
388
389 rmtadv = 0;
390 if (lpa & (1 << MC_CMD_PHY_CAP_PAUSE_LBN))
391 rmtadv |= ADVERTISED_Pause;
392 if (lpa & (1 << MC_CMD_PHY_CAP_ASYM_LBN))
393 rmtadv |= ADVERTISED_Asym_Pause;
394
395 if ((efx->wanted_fc & EFX_FC_TX) && rmtadv == ADVERTISED_Asym_Pause)
396 netif_err(efx, link, efx->net_dev,
397 "warning: link partner doesn't support pause frames");
398 }
399
efx_mcdi_phy_poll(struct efx_nic * efx)400 bool efx_mcdi_phy_poll(struct efx_nic *efx)
401 {
402 struct efx_link_state old_state = efx->link_state;
403 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN);
404 int rc;
405
406 WARN_ON(!mutex_is_locked(&efx->mac_lock));
407
408 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
409
410 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
411 outbuf, sizeof(outbuf), NULL);
412 if (rc)
413 efx->link_state.up = false;
414 else
415 efx_mcdi_phy_decode_link(
416 efx, &efx->link_state,
417 MCDI_DWORD(outbuf, GET_LINK_OUT_LINK_SPEED),
418 MCDI_DWORD(outbuf, GET_LINK_OUT_FLAGS),
419 MCDI_DWORD(outbuf, GET_LINK_OUT_FCNTL));
420
421 return !efx_link_state_equal(&efx->link_state, &old_state);
422 }
423
efx_mcdi_phy_probe(struct efx_nic * efx)424 int efx_mcdi_phy_probe(struct efx_nic *efx)
425 {
426 struct efx_mcdi_phy_data *phy_data;
427 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN);
428 u32 caps;
429 int rc;
430
431 /* Initialise and populate phy_data */
432 phy_data = kzalloc(sizeof(*phy_data), GFP_KERNEL);
433 if (phy_data == NULL)
434 return -ENOMEM;
435
436 rc = efx_mcdi_get_phy_cfg(efx, phy_data);
437 if (rc != 0)
438 goto fail;
439
440 /* Read initial link advertisement */
441 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
442 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
443 outbuf, sizeof(outbuf), NULL);
444 if (rc)
445 goto fail;
446
447 /* Fill out nic state */
448 efx->phy_data = phy_data;
449 efx->phy_type = phy_data->type;
450
451 efx->mdio_bus = phy_data->channel;
452 efx->mdio.prtad = phy_data->port;
453 efx->mdio.mmds = phy_data->mmd_mask & ~(1 << MC_CMD_MMD_CLAUSE22);
454 efx->mdio.mode_support = 0;
455 if (phy_data->mmd_mask & (1 << MC_CMD_MMD_CLAUSE22))
456 efx->mdio.mode_support |= MDIO_SUPPORTS_C22;
457 if (phy_data->mmd_mask & ~(1 << MC_CMD_MMD_CLAUSE22))
458 efx->mdio.mode_support |= MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
459
460 caps = MCDI_DWORD(outbuf, GET_LINK_OUT_CAP);
461 if (caps & (1 << MC_CMD_PHY_CAP_AN_LBN))
462 mcdi_to_ethtool_linkset(phy_data->media, caps,
463 efx->link_advertising);
464 else
465 phy_data->forced_cap = caps;
466
467 /* Assert that we can map efx -> mcdi loopback modes */
468 BUILD_BUG_ON(LOOPBACK_NONE != MC_CMD_LOOPBACK_NONE);
469 BUILD_BUG_ON(LOOPBACK_DATA != MC_CMD_LOOPBACK_DATA);
470 BUILD_BUG_ON(LOOPBACK_GMAC != MC_CMD_LOOPBACK_GMAC);
471 BUILD_BUG_ON(LOOPBACK_XGMII != MC_CMD_LOOPBACK_XGMII);
472 BUILD_BUG_ON(LOOPBACK_XGXS != MC_CMD_LOOPBACK_XGXS);
473 BUILD_BUG_ON(LOOPBACK_XAUI != MC_CMD_LOOPBACK_XAUI);
474 BUILD_BUG_ON(LOOPBACK_GMII != MC_CMD_LOOPBACK_GMII);
475 BUILD_BUG_ON(LOOPBACK_SGMII != MC_CMD_LOOPBACK_SGMII);
476 BUILD_BUG_ON(LOOPBACK_XGBR != MC_CMD_LOOPBACK_XGBR);
477 BUILD_BUG_ON(LOOPBACK_XFI != MC_CMD_LOOPBACK_XFI);
478 BUILD_BUG_ON(LOOPBACK_XAUI_FAR != MC_CMD_LOOPBACK_XAUI_FAR);
479 BUILD_BUG_ON(LOOPBACK_GMII_FAR != MC_CMD_LOOPBACK_GMII_FAR);
480 BUILD_BUG_ON(LOOPBACK_SGMII_FAR != MC_CMD_LOOPBACK_SGMII_FAR);
481 BUILD_BUG_ON(LOOPBACK_XFI_FAR != MC_CMD_LOOPBACK_XFI_FAR);
482 BUILD_BUG_ON(LOOPBACK_GPHY != MC_CMD_LOOPBACK_GPHY);
483 BUILD_BUG_ON(LOOPBACK_PHYXS != MC_CMD_LOOPBACK_PHYXS);
484 BUILD_BUG_ON(LOOPBACK_PCS != MC_CMD_LOOPBACK_PCS);
485 BUILD_BUG_ON(LOOPBACK_PMAPMD != MC_CMD_LOOPBACK_PMAPMD);
486 BUILD_BUG_ON(LOOPBACK_XPORT != MC_CMD_LOOPBACK_XPORT);
487 BUILD_BUG_ON(LOOPBACK_XGMII_WS != MC_CMD_LOOPBACK_XGMII_WS);
488 BUILD_BUG_ON(LOOPBACK_XAUI_WS != MC_CMD_LOOPBACK_XAUI_WS);
489 BUILD_BUG_ON(LOOPBACK_XAUI_WS_FAR != MC_CMD_LOOPBACK_XAUI_WS_FAR);
490 BUILD_BUG_ON(LOOPBACK_XAUI_WS_NEAR != MC_CMD_LOOPBACK_XAUI_WS_NEAR);
491 BUILD_BUG_ON(LOOPBACK_GMII_WS != MC_CMD_LOOPBACK_GMII_WS);
492 BUILD_BUG_ON(LOOPBACK_XFI_WS != MC_CMD_LOOPBACK_XFI_WS);
493 BUILD_BUG_ON(LOOPBACK_XFI_WS_FAR != MC_CMD_LOOPBACK_XFI_WS_FAR);
494 BUILD_BUG_ON(LOOPBACK_PHYXS_WS != MC_CMD_LOOPBACK_PHYXS_WS);
495
496 rc = efx_mcdi_loopback_modes(efx, &efx->loopback_modes);
497 if (rc != 0)
498 goto fail;
499 /* The MC indicates that LOOPBACK_NONE is a valid loopback mode,
500 * but by convention we don't
501 */
502 efx->loopback_modes &= ~(1 << LOOPBACK_NONE);
503
504 /* Set the initial link mode */
505 efx_mcdi_phy_decode_link(efx, &efx->link_state,
506 MCDI_DWORD(outbuf, GET_LINK_OUT_LINK_SPEED),
507 MCDI_DWORD(outbuf, GET_LINK_OUT_FLAGS),
508 MCDI_DWORD(outbuf, GET_LINK_OUT_FCNTL));
509
510 /* Record the initial FEC configuration (or nearest approximation
511 * representable in the ethtool configuration space)
512 */
513 efx->fec_config = mcdi_fec_caps_to_ethtool(caps,
514 efx->link_state.speed == 25000 ||
515 efx->link_state.speed == 50000);
516
517 /* Default to Autonegotiated flow control if the PHY supports it */
518 efx->wanted_fc = EFX_FC_RX | EFX_FC_TX;
519 if (phy_data->supported_cap & (1 << MC_CMD_PHY_CAP_AN_LBN))
520 efx->wanted_fc |= EFX_FC_AUTO;
521 efx_link_set_wanted_fc(efx, efx->wanted_fc);
522
523 return 0;
524
525 fail:
526 kfree(phy_data);
527 return rc;
528 }
529
efx_mcdi_phy_remove(struct efx_nic * efx)530 void efx_mcdi_phy_remove(struct efx_nic *efx)
531 {
532 struct efx_mcdi_phy_data *phy_data = efx->phy_data;
533
534 efx->phy_data = NULL;
535 kfree(phy_data);
536 }
537
efx_mcdi_phy_get_link_ksettings(struct efx_nic * efx,struct ethtool_link_ksettings * cmd)538 void efx_mcdi_phy_get_link_ksettings(struct efx_nic *efx, struct ethtool_link_ksettings *cmd)
539 {
540 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
541 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN);
542 int rc;
543
544 cmd->base.speed = efx->link_state.speed;
545 cmd->base.duplex = efx->link_state.fd;
546 cmd->base.port = mcdi_to_ethtool_media(phy_cfg->media);
547 cmd->base.phy_address = phy_cfg->port;
548 cmd->base.autoneg = !!(efx->link_advertising[0] & ADVERTISED_Autoneg);
549 cmd->base.mdio_support = (efx->mdio.mode_support &
550 (MDIO_SUPPORTS_C45 | MDIO_SUPPORTS_C22));
551
552 mcdi_to_ethtool_linkset(phy_cfg->media, phy_cfg->supported_cap,
553 cmd->link_modes.supported);
554 memcpy(cmd->link_modes.advertising, efx->link_advertising,
555 sizeof(__ETHTOOL_DECLARE_LINK_MODE_MASK()));
556
557 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
558 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
559 outbuf, sizeof(outbuf), NULL);
560 if (rc)
561 return;
562 mcdi_to_ethtool_linkset(phy_cfg->media,
563 MCDI_DWORD(outbuf, GET_LINK_OUT_LP_CAP),
564 cmd->link_modes.lp_advertising);
565 }
566
efx_mcdi_phy_set_link_ksettings(struct efx_nic * efx,const struct ethtool_link_ksettings * cmd)567 int efx_mcdi_phy_set_link_ksettings(struct efx_nic *efx, const struct ethtool_link_ksettings *cmd)
568 {
569 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
570 u32 caps;
571 int rc;
572
573 if (cmd->base.autoneg) {
574 caps = (ethtool_linkset_to_mcdi_cap(cmd->link_modes.advertising) |
575 1 << MC_CMD_PHY_CAP_AN_LBN);
576 } else if (cmd->base.duplex) {
577 switch (cmd->base.speed) {
578 case 10: caps = 1 << MC_CMD_PHY_CAP_10FDX_LBN; break;
579 case 100: caps = 1 << MC_CMD_PHY_CAP_100FDX_LBN; break;
580 case 1000: caps = 1 << MC_CMD_PHY_CAP_1000FDX_LBN; break;
581 case 10000: caps = 1 << MC_CMD_PHY_CAP_10000FDX_LBN; break;
582 case 40000: caps = 1 << MC_CMD_PHY_CAP_40000FDX_LBN; break;
583 case 100000: caps = 1 << MC_CMD_PHY_CAP_100000FDX_LBN; break;
584 case 25000: caps = 1 << MC_CMD_PHY_CAP_25000FDX_LBN; break;
585 case 50000: caps = 1 << MC_CMD_PHY_CAP_50000FDX_LBN; break;
586 default: return -EINVAL;
587 }
588 } else {
589 switch (cmd->base.speed) {
590 case 10: caps = 1 << MC_CMD_PHY_CAP_10HDX_LBN; break;
591 case 100: caps = 1 << MC_CMD_PHY_CAP_100HDX_LBN; break;
592 case 1000: caps = 1 << MC_CMD_PHY_CAP_1000HDX_LBN; break;
593 default: return -EINVAL;
594 }
595 }
596
597 caps |= ethtool_fec_caps_to_mcdi(phy_cfg->supported_cap, efx->fec_config);
598
599 rc = efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx),
600 efx->loopback_mode, 0);
601 if (rc)
602 return rc;
603
604 if (cmd->base.autoneg) {
605 efx_link_set_advertising(efx, cmd->link_modes.advertising);
606 phy_cfg->forced_cap = 0;
607 } else {
608 efx_link_clear_advertising(efx);
609 phy_cfg->forced_cap = caps;
610 }
611 return 0;
612 }
613
efx_mcdi_phy_get_fecparam(struct efx_nic * efx,struct ethtool_fecparam * fec)614 int efx_mcdi_phy_get_fecparam(struct efx_nic *efx, struct ethtool_fecparam *fec)
615 {
616 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_V2_LEN);
617 u32 caps, active, speed; /* MCDI format */
618 bool is_25g = false;
619 size_t outlen;
620 int rc;
621
622 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
623 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
624 outbuf, sizeof(outbuf), &outlen);
625 if (rc)
626 return rc;
627 if (outlen < MC_CMD_GET_LINK_OUT_V2_LEN)
628 return -EOPNOTSUPP;
629
630 /* behaviour for 25G/50G links depends on 25G BASER bit */
631 speed = MCDI_DWORD(outbuf, GET_LINK_OUT_V2_LINK_SPEED);
632 is_25g = speed == 25000 || speed == 50000;
633
634 caps = MCDI_DWORD(outbuf, GET_LINK_OUT_V2_CAP);
635 fec->fec = mcdi_fec_caps_to_ethtool(caps, is_25g);
636 /* BASER is never supported on 100G */
637 if (speed == 100000)
638 fec->fec &= ~ETHTOOL_FEC_BASER;
639
640 active = MCDI_DWORD(outbuf, GET_LINK_OUT_V2_FEC_TYPE);
641 switch (active) {
642 case MC_CMD_FEC_NONE:
643 fec->active_fec = ETHTOOL_FEC_OFF;
644 break;
645 case MC_CMD_FEC_BASER:
646 fec->active_fec = ETHTOOL_FEC_BASER;
647 break;
648 case MC_CMD_FEC_RS:
649 fec->active_fec = ETHTOOL_FEC_RS;
650 break;
651 default:
652 netif_warn(efx, hw, efx->net_dev,
653 "Firmware reports unrecognised FEC_TYPE %u\n",
654 active);
655 /* We don't know what firmware has picked. AUTO is as good a
656 * "can't happen" value as any other.
657 */
658 fec->active_fec = ETHTOOL_FEC_AUTO;
659 break;
660 }
661
662 return 0;
663 }
664
665 /* Basic validation to ensure that the caps we are going to attempt to set are
666 * in fact supported by the adapter. Note that 'no FEC' is always supported.
667 */
ethtool_fec_supported(u32 supported_cap,u32 ethtool_cap)668 static int ethtool_fec_supported(u32 supported_cap, u32 ethtool_cap)
669 {
670 if (ethtool_cap & ETHTOOL_FEC_OFF)
671 return 0;
672
673 if (ethtool_cap &&
674 !ethtool_fec_caps_to_mcdi(supported_cap, ethtool_cap))
675 return -EINVAL;
676 return 0;
677 }
678
efx_mcdi_phy_set_fecparam(struct efx_nic * efx,const struct ethtool_fecparam * fec)679 int efx_mcdi_phy_set_fecparam(struct efx_nic *efx, const struct ethtool_fecparam *fec)
680 {
681 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
682 u32 caps;
683 int rc;
684
685 rc = ethtool_fec_supported(phy_cfg->supported_cap, fec->fec);
686 if (rc)
687 return rc;
688
689 /* Work out what efx_mcdi_phy_set_link_ksettings() would produce from
690 * saved advertising bits
691 */
692 if (test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, efx->link_advertising))
693 caps = (ethtool_linkset_to_mcdi_cap(efx->link_advertising) |
694 1 << MC_CMD_PHY_CAP_AN_LBN);
695 else
696 caps = phy_cfg->forced_cap;
697
698 caps |= ethtool_fec_caps_to_mcdi(phy_cfg->supported_cap, fec->fec);
699 rc = efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx),
700 efx->loopback_mode, 0);
701 if (rc)
702 return rc;
703
704 /* Record the new FEC setting for subsequent set_link calls */
705 efx->fec_config = fec->fec;
706 return 0;
707 }
708
efx_mcdi_phy_test_alive(struct efx_nic * efx)709 int efx_mcdi_phy_test_alive(struct efx_nic *efx)
710 {
711 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PHY_STATE_OUT_LEN);
712 size_t outlen;
713 int rc;
714
715 BUILD_BUG_ON(MC_CMD_GET_PHY_STATE_IN_LEN != 0);
716
717 rc = efx_mcdi_rpc(efx, MC_CMD_GET_PHY_STATE, NULL, 0,
718 outbuf, sizeof(outbuf), &outlen);
719 if (rc)
720 return rc;
721
722 if (outlen < MC_CMD_GET_PHY_STATE_OUT_LEN)
723 return -EIO;
724 if (MCDI_DWORD(outbuf, GET_PHY_STATE_OUT_STATE) != MC_CMD_PHY_STATE_OK)
725 return -EINVAL;
726
727 return 0;
728 }
729
efx_mcdi_port_reconfigure(struct efx_nic * efx)730 int efx_mcdi_port_reconfigure(struct efx_nic *efx)
731 {
732 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
733 u32 caps = (efx->link_advertising[0] ?
734 ethtool_linkset_to_mcdi_cap(efx->link_advertising) :
735 phy_cfg->forced_cap);
736
737 caps |= ethtool_fec_caps_to_mcdi(phy_cfg->supported_cap, efx->fec_config);
738
739 return efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx),
740 efx->loopback_mode, 0);
741 }
742
743 static const char *const mcdi_sft9001_cable_diag_names[] = {
744 "cable.pairA.length",
745 "cable.pairB.length",
746 "cable.pairC.length",
747 "cable.pairD.length",
748 "cable.pairA.status",
749 "cable.pairB.status",
750 "cable.pairC.status",
751 "cable.pairD.status",
752 };
753
efx_mcdi_bist(struct efx_nic * efx,unsigned int bist_mode,int * results)754 static int efx_mcdi_bist(struct efx_nic *efx, unsigned int bist_mode,
755 int *results)
756 {
757 unsigned int retry, i, count = 0;
758 size_t outlen;
759 u32 status;
760 MCDI_DECLARE_BUF(inbuf, MC_CMD_START_BIST_IN_LEN);
761 MCDI_DECLARE_BUF(outbuf, MC_CMD_POLL_BIST_OUT_SFT9001_LEN);
762 u8 *ptr;
763 int rc;
764
765 BUILD_BUG_ON(MC_CMD_START_BIST_OUT_LEN != 0);
766 MCDI_SET_DWORD(inbuf, START_BIST_IN_TYPE, bist_mode);
767 rc = efx_mcdi_rpc(efx, MC_CMD_START_BIST,
768 inbuf, MC_CMD_START_BIST_IN_LEN, NULL, 0, NULL);
769 if (rc)
770 goto out;
771
772 /* Wait up to 10s for BIST to finish */
773 for (retry = 0; retry < 100; ++retry) {
774 BUILD_BUG_ON(MC_CMD_POLL_BIST_IN_LEN != 0);
775 rc = efx_mcdi_rpc(efx, MC_CMD_POLL_BIST, NULL, 0,
776 outbuf, sizeof(outbuf), &outlen);
777 if (rc)
778 goto out;
779
780 status = MCDI_DWORD(outbuf, POLL_BIST_OUT_RESULT);
781 if (status != MC_CMD_POLL_BIST_RUNNING)
782 goto finished;
783
784 msleep(100);
785 }
786
787 rc = -ETIMEDOUT;
788 goto out;
789
790 finished:
791 results[count++] = (status == MC_CMD_POLL_BIST_PASSED) ? 1 : -1;
792
793 /* SFT9001 specific cable diagnostics output */
794 if (efx->phy_type == PHY_TYPE_SFT9001B &&
795 (bist_mode == MC_CMD_PHY_BIST_CABLE_SHORT ||
796 bist_mode == MC_CMD_PHY_BIST_CABLE_LONG)) {
797 ptr = MCDI_PTR(outbuf, POLL_BIST_OUT_SFT9001_CABLE_LENGTH_A);
798 if (status == MC_CMD_POLL_BIST_PASSED &&
799 outlen >= MC_CMD_POLL_BIST_OUT_SFT9001_LEN) {
800 for (i = 0; i < 8; i++) {
801 results[count + i] =
802 EFX_DWORD_FIELD(((efx_dword_t *)ptr)[i],
803 EFX_DWORD_0);
804 }
805 }
806 count += 8;
807 }
808 rc = count;
809
810 out:
811 return rc;
812 }
813
efx_mcdi_phy_run_tests(struct efx_nic * efx,int * results,unsigned int flags)814 int efx_mcdi_phy_run_tests(struct efx_nic *efx, int *results, unsigned int flags)
815 {
816 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
817 u32 mode;
818 int rc;
819
820 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_LBN)) {
821 rc = efx_mcdi_bist(efx, MC_CMD_PHY_BIST, results);
822 if (rc < 0)
823 return rc;
824
825 results += rc;
826 }
827
828 /* If we support both LONG and SHORT, then run each in response to
829 * break or not. Otherwise, run the one we support
830 */
831 mode = 0;
832 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_SHORT_LBN)) {
833 if ((flags & ETH_TEST_FL_OFFLINE) &&
834 (phy_cfg->flags &
835 (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN)))
836 mode = MC_CMD_PHY_BIST_CABLE_LONG;
837 else
838 mode = MC_CMD_PHY_BIST_CABLE_SHORT;
839 } else if (phy_cfg->flags &
840 (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN))
841 mode = MC_CMD_PHY_BIST_CABLE_LONG;
842
843 if (mode != 0) {
844 rc = efx_mcdi_bist(efx, mode, results);
845 if (rc < 0)
846 return rc;
847 results += rc;
848 }
849
850 return 0;
851 }
852
efx_mcdi_phy_test_name(struct efx_nic * efx,unsigned int index)853 const char *efx_mcdi_phy_test_name(struct efx_nic *efx, unsigned int index)
854 {
855 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
856
857 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_LBN)) {
858 if (index == 0)
859 return "bist";
860 --index;
861 }
862
863 if (phy_cfg->flags & ((1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_SHORT_LBN) |
864 (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN))) {
865 if (index == 0)
866 return "cable";
867 --index;
868
869 if (efx->phy_type == PHY_TYPE_SFT9001B) {
870 if (index < ARRAY_SIZE(mcdi_sft9001_cable_diag_names))
871 return mcdi_sft9001_cable_diag_names[index];
872 index -= ARRAY_SIZE(mcdi_sft9001_cable_diag_names);
873 }
874 }
875
876 return NULL;
877 }
878
879 #define SFP_PAGE_SIZE 128
880 #define SFF_DIAG_TYPE_OFFSET 92
881 #define SFF_DIAG_ADDR_CHANGE BIT(2)
882 #define SFF_8079_NUM_PAGES 2
883 #define SFF_8472_NUM_PAGES 4
884 #define SFF_8436_NUM_PAGES 5
885 #define SFF_DMT_LEVEL_OFFSET 94
886
887 /** efx_mcdi_phy_get_module_eeprom_page() - Get a single page of module eeprom
888 * @efx: NIC context
889 * @page: EEPROM page number
890 * @data: Destination data pointer
891 * @offset: Offset in page to copy from in to data
892 * @space: Space available in data
893 *
894 * Return:
895 * >=0 - amount of data copied
896 * <0 - error
897 */
efx_mcdi_phy_get_module_eeprom_page(struct efx_nic * efx,unsigned int page,u8 * data,ssize_t offset,ssize_t space)898 static int efx_mcdi_phy_get_module_eeprom_page(struct efx_nic *efx,
899 unsigned int page,
900 u8 *data, ssize_t offset,
901 ssize_t space)
902 {
903 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PHY_MEDIA_INFO_OUT_LENMAX);
904 MCDI_DECLARE_BUF(inbuf, MC_CMD_GET_PHY_MEDIA_INFO_IN_LEN);
905 unsigned int payload_len;
906 unsigned int to_copy;
907 size_t outlen;
908 int rc;
909
910 if (offset > SFP_PAGE_SIZE)
911 return -EINVAL;
912
913 to_copy = min(space, SFP_PAGE_SIZE - offset);
914
915 MCDI_SET_DWORD(inbuf, GET_PHY_MEDIA_INFO_IN_PAGE, page);
916 rc = efx_mcdi_rpc_quiet(efx, MC_CMD_GET_PHY_MEDIA_INFO,
917 inbuf, sizeof(inbuf),
918 outbuf, sizeof(outbuf),
919 &outlen);
920
921 if (rc)
922 return rc;
923
924 if (outlen < (MC_CMD_GET_PHY_MEDIA_INFO_OUT_DATA_OFST +
925 SFP_PAGE_SIZE))
926 return -EIO;
927
928 payload_len = MCDI_DWORD(outbuf, GET_PHY_MEDIA_INFO_OUT_DATALEN);
929 if (payload_len != SFP_PAGE_SIZE)
930 return -EIO;
931
932 memcpy(data, MCDI_PTR(outbuf, GET_PHY_MEDIA_INFO_OUT_DATA) + offset,
933 to_copy);
934
935 return to_copy;
936 }
937
efx_mcdi_phy_get_module_eeprom_byte(struct efx_nic * efx,unsigned int page,u8 byte)938 static int efx_mcdi_phy_get_module_eeprom_byte(struct efx_nic *efx,
939 unsigned int page,
940 u8 byte)
941 {
942 u8 data;
943 int rc;
944
945 rc = efx_mcdi_phy_get_module_eeprom_page(efx, page, &data, byte, 1);
946 if (rc == 1)
947 return data;
948
949 return rc;
950 }
951
efx_mcdi_phy_diag_type(struct efx_nic * efx)952 static int efx_mcdi_phy_diag_type(struct efx_nic *efx)
953 {
954 /* Page zero of the EEPROM includes the diagnostic type at byte 92. */
955 return efx_mcdi_phy_get_module_eeprom_byte(efx, 0,
956 SFF_DIAG_TYPE_OFFSET);
957 }
958
efx_mcdi_phy_sff_8472_level(struct efx_nic * efx)959 static int efx_mcdi_phy_sff_8472_level(struct efx_nic *efx)
960 {
961 /* Page zero of the EEPROM includes the DMT level at byte 94. */
962 return efx_mcdi_phy_get_module_eeprom_byte(efx, 0,
963 SFF_DMT_LEVEL_OFFSET);
964 }
965
efx_mcdi_phy_module_type(struct efx_nic * efx)966 static u32 efx_mcdi_phy_module_type(struct efx_nic *efx)
967 {
968 struct efx_mcdi_phy_data *phy_data = efx->phy_data;
969
970 if (phy_data->media != MC_CMD_MEDIA_QSFP_PLUS)
971 return phy_data->media;
972
973 /* A QSFP+ NIC may actually have an SFP+ module attached.
974 * The ID is page 0, byte 0.
975 * QSFP28 is of type SFF_8636, however, this is treated
976 * the same by ethtool, so we can also treat them the same.
977 */
978 switch (efx_mcdi_phy_get_module_eeprom_byte(efx, 0, 0)) {
979 case 0x3: /* SFP */
980 return MC_CMD_MEDIA_SFP_PLUS;
981 case 0xc: /* QSFP */
982 case 0xd: /* QSFP+ */
983 case 0x11: /* QSFP28 */
984 return MC_CMD_MEDIA_QSFP_PLUS;
985 default:
986 return 0;
987 }
988 }
989
efx_mcdi_phy_get_module_eeprom(struct efx_nic * efx,struct ethtool_eeprom * ee,u8 * data)990 int efx_mcdi_phy_get_module_eeprom(struct efx_nic *efx, struct ethtool_eeprom *ee, u8 *data)
991 {
992 int rc;
993 ssize_t space_remaining = ee->len;
994 unsigned int page_off;
995 bool ignore_missing;
996 int num_pages;
997 int page;
998
999 switch (efx_mcdi_phy_module_type(efx)) {
1000 case MC_CMD_MEDIA_SFP_PLUS:
1001 num_pages = efx_mcdi_phy_sff_8472_level(efx) > 0 ?
1002 SFF_8472_NUM_PAGES : SFF_8079_NUM_PAGES;
1003 page = 0;
1004 ignore_missing = false;
1005 break;
1006 case MC_CMD_MEDIA_QSFP_PLUS:
1007 num_pages = SFF_8436_NUM_PAGES;
1008 page = -1; /* We obtain the lower page by asking for -1. */
1009 ignore_missing = true; /* Ignore missing pages after page 0. */
1010 break;
1011 default:
1012 return -EOPNOTSUPP;
1013 }
1014
1015 page_off = ee->offset % SFP_PAGE_SIZE;
1016 page += ee->offset / SFP_PAGE_SIZE;
1017
1018 while (space_remaining && (page < num_pages)) {
1019 rc = efx_mcdi_phy_get_module_eeprom_page(efx, page,
1020 data, page_off,
1021 space_remaining);
1022
1023 if (rc > 0) {
1024 space_remaining -= rc;
1025 data += rc;
1026 page_off = 0;
1027 page++;
1028 } else if (rc == 0) {
1029 space_remaining = 0;
1030 } else if (ignore_missing && (page > 0)) {
1031 int intended_size = SFP_PAGE_SIZE - page_off;
1032
1033 space_remaining -= intended_size;
1034 if (space_remaining < 0) {
1035 space_remaining = 0;
1036 } else {
1037 memset(data, 0, intended_size);
1038 data += intended_size;
1039 page_off = 0;
1040 page++;
1041 rc = 0;
1042 }
1043 } else {
1044 return rc;
1045 }
1046 }
1047
1048 return 0;
1049 }
1050
efx_mcdi_phy_get_module_info(struct efx_nic * efx,struct ethtool_modinfo * modinfo)1051 int efx_mcdi_phy_get_module_info(struct efx_nic *efx, struct ethtool_modinfo *modinfo)
1052 {
1053 int sff_8472_level;
1054 int diag_type;
1055
1056 switch (efx_mcdi_phy_module_type(efx)) {
1057 case MC_CMD_MEDIA_SFP_PLUS:
1058 sff_8472_level = efx_mcdi_phy_sff_8472_level(efx);
1059
1060 /* If we can't read the diagnostics level we have none. */
1061 if (sff_8472_level < 0)
1062 return -EOPNOTSUPP;
1063
1064 /* Check if this module requires the (unsupported) address
1065 * change operation.
1066 */
1067 diag_type = efx_mcdi_phy_diag_type(efx);
1068
1069 if (sff_8472_level == 0 ||
1070 (diag_type & SFF_DIAG_ADDR_CHANGE)) {
1071 modinfo->type = ETH_MODULE_SFF_8079;
1072 modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN;
1073 } else {
1074 modinfo->type = ETH_MODULE_SFF_8472;
1075 modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN;
1076 }
1077 break;
1078
1079 case MC_CMD_MEDIA_QSFP_PLUS:
1080 modinfo->type = ETH_MODULE_SFF_8436;
1081 modinfo->eeprom_len = ETH_MODULE_SFF_8436_MAX_LEN;
1082 break;
1083
1084 default:
1085 return -EOPNOTSUPP;
1086 }
1087
1088 return 0;
1089 }
1090
efx_calc_mac_mtu(struct efx_nic * efx)1091 static unsigned int efx_calc_mac_mtu(struct efx_nic *efx)
1092 {
1093 return EFX_MAX_FRAME_LEN(efx->net_dev->mtu);
1094 }
1095
efx_mcdi_set_mac(struct efx_nic * efx)1096 int efx_mcdi_set_mac(struct efx_nic *efx)
1097 {
1098 u32 fcntl;
1099 MCDI_DECLARE_BUF(cmdbytes, MC_CMD_SET_MAC_IN_LEN);
1100
1101 BUILD_BUG_ON(MC_CMD_SET_MAC_OUT_LEN != 0);
1102
1103 /* This has no effect on EF10 */
1104 ether_addr_copy(MCDI_PTR(cmdbytes, SET_MAC_IN_ADDR),
1105 efx->net_dev->dev_addr);
1106
1107 MCDI_SET_DWORD(cmdbytes, SET_MAC_IN_MTU, efx_calc_mac_mtu(efx));
1108 MCDI_SET_DWORD(cmdbytes, SET_MAC_IN_DRAIN, 0);
1109 MCDI_POPULATE_DWORD_1(cmdbytes, SET_MAC_IN_FLAGS,
1110 SET_MAC_IN_FLAG_INCLUDE_FCS,
1111 !!(efx->net_dev->features & NETIF_F_RXFCS));
1112
1113 switch (efx->wanted_fc) {
1114 case EFX_FC_RX | EFX_FC_TX:
1115 fcntl = MC_CMD_FCNTL_BIDIR;
1116 break;
1117 case EFX_FC_RX:
1118 fcntl = MC_CMD_FCNTL_RESPOND;
1119 break;
1120 default:
1121 fcntl = MC_CMD_FCNTL_OFF;
1122 break;
1123 }
1124 if (efx->wanted_fc & EFX_FC_AUTO)
1125 fcntl = MC_CMD_FCNTL_AUTO;
1126 if (efx->fc_disable)
1127 fcntl = MC_CMD_FCNTL_OFF;
1128
1129 MCDI_SET_DWORD(cmdbytes, SET_MAC_IN_FCNTL, fcntl);
1130
1131 return efx_mcdi_rpc(efx, MC_CMD_SET_MAC, cmdbytes, sizeof(cmdbytes),
1132 NULL, 0, NULL);
1133 }
1134
efx_mcdi_set_mtu(struct efx_nic * efx)1135 int efx_mcdi_set_mtu(struct efx_nic *efx)
1136 {
1137 MCDI_DECLARE_BUF(inbuf, MC_CMD_SET_MAC_EXT_IN_LEN);
1138
1139 BUILD_BUG_ON(MC_CMD_SET_MAC_OUT_LEN != 0);
1140
1141 MCDI_SET_DWORD(inbuf, SET_MAC_EXT_IN_MTU, efx_calc_mac_mtu(efx));
1142
1143 MCDI_POPULATE_DWORD_1(inbuf, SET_MAC_EXT_IN_CONTROL,
1144 SET_MAC_EXT_IN_CFG_MTU, 1);
1145
1146 return efx_mcdi_rpc(efx, MC_CMD_SET_MAC, inbuf, sizeof(inbuf),
1147 NULL, 0, NULL);
1148 }
1149
1150 enum efx_stats_action {
1151 EFX_STATS_ENABLE,
1152 EFX_STATS_DISABLE,
1153 EFX_STATS_PULL,
1154 };
1155
efx_mcdi_mac_stats(struct efx_nic * efx,enum efx_stats_action action,int clear)1156 static int efx_mcdi_mac_stats(struct efx_nic *efx,
1157 enum efx_stats_action action, int clear)
1158 {
1159 MCDI_DECLARE_BUF(inbuf, MC_CMD_MAC_STATS_IN_LEN);
1160 int rc;
1161 int change = action == EFX_STATS_PULL ? 0 : 1;
1162 int enable = action == EFX_STATS_ENABLE ? 1 : 0;
1163 int period = action == EFX_STATS_ENABLE ? 1000 : 0;
1164 dma_addr_t dma_addr = efx->stats_buffer.dma_addr;
1165 u32 dma_len = action != EFX_STATS_DISABLE ?
1166 efx->num_mac_stats * sizeof(u64) : 0;
1167
1168 BUILD_BUG_ON(MC_CMD_MAC_STATS_OUT_DMA_LEN != 0);
1169
1170 MCDI_SET_QWORD(inbuf, MAC_STATS_IN_DMA_ADDR, dma_addr);
1171 MCDI_POPULATE_DWORD_7(inbuf, MAC_STATS_IN_CMD,
1172 MAC_STATS_IN_DMA, !!enable,
1173 MAC_STATS_IN_CLEAR, clear,
1174 MAC_STATS_IN_PERIODIC_CHANGE, change,
1175 MAC_STATS_IN_PERIODIC_ENABLE, enable,
1176 MAC_STATS_IN_PERIODIC_CLEAR, 0,
1177 MAC_STATS_IN_PERIODIC_NOEVENT, 1,
1178 MAC_STATS_IN_PERIOD_MS, period);
1179 MCDI_SET_DWORD(inbuf, MAC_STATS_IN_DMA_LEN, dma_len);
1180
1181 if (efx_nic_rev(efx) >= EFX_REV_HUNT_A0)
1182 MCDI_SET_DWORD(inbuf, MAC_STATS_IN_PORT_ID, efx->vport_id);
1183
1184 rc = efx_mcdi_rpc_quiet(efx, MC_CMD_MAC_STATS, inbuf, sizeof(inbuf),
1185 NULL, 0, NULL);
1186 /* Expect ENOENT if DMA queues have not been set up */
1187 if (rc && (rc != -ENOENT || atomic_read(&efx->active_queues)))
1188 efx_mcdi_display_error(efx, MC_CMD_MAC_STATS, sizeof(inbuf),
1189 NULL, 0, rc);
1190 return rc;
1191 }
1192
efx_mcdi_mac_start_stats(struct efx_nic * efx)1193 void efx_mcdi_mac_start_stats(struct efx_nic *efx)
1194 {
1195 __le64 *dma_stats = efx->stats_buffer.addr;
1196
1197 dma_stats[efx->num_mac_stats - 1] = EFX_MC_STATS_GENERATION_INVALID;
1198
1199 efx_mcdi_mac_stats(efx, EFX_STATS_ENABLE, 0);
1200 }
1201
efx_mcdi_mac_stop_stats(struct efx_nic * efx)1202 void efx_mcdi_mac_stop_stats(struct efx_nic *efx)
1203 {
1204 efx_mcdi_mac_stats(efx, EFX_STATS_DISABLE, 0);
1205 }
1206
1207 #define EFX_MAC_STATS_WAIT_US 100
1208 #define EFX_MAC_STATS_WAIT_ATTEMPTS 10
1209
efx_mcdi_mac_pull_stats(struct efx_nic * efx)1210 void efx_mcdi_mac_pull_stats(struct efx_nic *efx)
1211 {
1212 __le64 *dma_stats = efx->stats_buffer.addr;
1213 int attempts = EFX_MAC_STATS_WAIT_ATTEMPTS;
1214
1215 dma_stats[efx->num_mac_stats - 1] = EFX_MC_STATS_GENERATION_INVALID;
1216 efx_mcdi_mac_stats(efx, EFX_STATS_PULL, 0);
1217
1218 while (dma_stats[efx->num_mac_stats - 1] ==
1219 EFX_MC_STATS_GENERATION_INVALID &&
1220 attempts-- != 0)
1221 udelay(EFX_MAC_STATS_WAIT_US);
1222 }
1223
efx_mcdi_mac_init_stats(struct efx_nic * efx)1224 int efx_mcdi_mac_init_stats(struct efx_nic *efx)
1225 {
1226 int rc;
1227
1228 if (!efx->num_mac_stats)
1229 return 0;
1230
1231 /* Allocate buffer for stats */
1232 rc = efx_nic_alloc_buffer(efx, &efx->stats_buffer,
1233 efx->num_mac_stats * sizeof(u64), GFP_KERNEL);
1234 if (rc) {
1235 netif_warn(efx, probe, efx->net_dev,
1236 "failed to allocate DMA buffer: %d\n", rc);
1237 return rc;
1238 }
1239
1240 netif_dbg(efx, probe, efx->net_dev,
1241 "stats buffer at %llx (virt %p phys %llx)\n",
1242 (u64) efx->stats_buffer.dma_addr,
1243 efx->stats_buffer.addr,
1244 (u64) virt_to_phys(efx->stats_buffer.addr));
1245
1246 return 0;
1247 }
1248
efx_mcdi_mac_fini_stats(struct efx_nic * efx)1249 void efx_mcdi_mac_fini_stats(struct efx_nic *efx)
1250 {
1251 efx_nic_free_buffer(efx, &efx->stats_buffer);
1252 }
1253
1254 /* Get physical port number (EF10 only; on Siena it is same as PF number) */
efx_mcdi_port_get_number(struct efx_nic * efx)1255 int efx_mcdi_port_get_number(struct efx_nic *efx)
1256 {
1257 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PORT_ASSIGNMENT_OUT_LEN);
1258 int rc;
1259
1260 rc = efx_mcdi_rpc(efx, MC_CMD_GET_PORT_ASSIGNMENT, NULL, 0,
1261 outbuf, sizeof(outbuf), NULL);
1262 if (rc)
1263 return rc;
1264
1265 return MCDI_DWORD(outbuf, GET_PORT_ASSIGNMENT_OUT_PORT);
1266 }
1267
1268 static unsigned int efx_mcdi_event_link_speed[] = {
1269 [MCDI_EVENT_LINKCHANGE_SPEED_100M] = 100,
1270 [MCDI_EVENT_LINKCHANGE_SPEED_1G] = 1000,
1271 [MCDI_EVENT_LINKCHANGE_SPEED_10G] = 10000,
1272 [MCDI_EVENT_LINKCHANGE_SPEED_40G] = 40000,
1273 [MCDI_EVENT_LINKCHANGE_SPEED_25G] = 25000,
1274 [MCDI_EVENT_LINKCHANGE_SPEED_50G] = 50000,
1275 [MCDI_EVENT_LINKCHANGE_SPEED_100G] = 100000,
1276 };
1277
efx_mcdi_process_link_change(struct efx_nic * efx,efx_qword_t * ev)1278 void efx_mcdi_process_link_change(struct efx_nic *efx, efx_qword_t *ev)
1279 {
1280 u32 flags, fcntl, speed, lpa;
1281
1282 speed = EFX_QWORD_FIELD(*ev, MCDI_EVENT_LINKCHANGE_SPEED);
1283 EFX_WARN_ON_PARANOID(speed >= ARRAY_SIZE(efx_mcdi_event_link_speed));
1284 speed = efx_mcdi_event_link_speed[speed];
1285
1286 flags = EFX_QWORD_FIELD(*ev, MCDI_EVENT_LINKCHANGE_LINK_FLAGS);
1287 fcntl = EFX_QWORD_FIELD(*ev, MCDI_EVENT_LINKCHANGE_FCNTL);
1288 lpa = EFX_QWORD_FIELD(*ev, MCDI_EVENT_LINKCHANGE_LP_CAP);
1289
1290 /* efx->link_state is only modified by efx_mcdi_phy_get_link(),
1291 * which is only run after flushing the event queues. Therefore, it
1292 * is safe to modify the link state outside of the mac_lock here.
1293 */
1294 efx_mcdi_phy_decode_link(efx, &efx->link_state, speed, flags, fcntl);
1295
1296 efx_mcdi_phy_check_fcntl(efx, lpa);
1297
1298 efx_link_status_changed(efx);
1299 }
1300